package com.zhang.helper;

import com.zhang.util.ReflectionUtil;

import java.util.HashMap;
import java.util.Map;
import java.util.Set;

/**
 * Bean 助手类
 * @author zhangxinzheng
 * @Date 2016/7/1
 */
public final class BeanHelper {
    private static final Map<Class<?>,Object> BEAN_MAP = new HashMap<Class<?>, Object>();
    static {
        Set<Class<?>> beanClassSet = ClassHepler.getBeanClassSet();
        for(Class<?> beanClass:beanClassSet){
            Object obj = ReflectionUtil.newInstance(beanClass);
            BEAN_MAP.put(beanClass,obj);
        }
    }
    /**
     * 获取Bean映射
     */
    public static Map<Class<?>,Object> getBeanMap(){
        return BEAN_MAP;
    }
    /**
     * 获取Bean实例
     */
    @SuppressWarnings("unchecked")
    public static <T> T getBean(Class<T> cls){
        if(!BEAN_MAP.containsKey(cls)){
            throw new RuntimeException("can not get bean by class: " + cls);
        }
        return (T)BEAN_MAP.get(cls);
    }
    /**
     * 设置Bean实例
     */
    public static void setBean(Class<?> cls,Object obj){
        BEAN_MAP.put(cls,obj);
    }
}
